Device for filing circular saws



sept. 2o, 1949.

w. G. SHEARER DEVICE FOR FILING CIRCULAR SAWS Filed Jan. 5, 1948 FIG. 2.*

lNVENTOl-. 5h e ar` er' ATTORN EYS.

Sept 20, l949- w. G. sHEARl-:R Y 21,482,694

DEVICE FOR FILING CIRCULAR SAWS Filed Jan. 5, 1948 4 Sheets-Sheet 2 s; lll "if 76o 53 m, L A' 26 @h .hiv 2a g1 3]./0 a lhllllmlmlllmu1 l f VV'ELH'EI"V L j. 511 EELTEP Y BY l Sept. 2o, 1949. W. G. SHEARER 2,482,694

DEVICE` FOR FILING CIRCULAR SAWS Filed Jan. 5, 1948 I -4 Sheeis-Sheet 3 INVENTOR.

Wam-Ef E; Emea? Er ATTORNEYS.

Sept. 20, 1949.

Filed Jan. 5, 1948 I I/6 gg/IG. 535;

w. G. SHEARER DEVICE FOR FILING CIRCULAR SAWS I 4 Sheets-Sheet 4 INVENTOR.

A\/aI-"ner E. Shearer'.

BYQM-a,

ATTORNEYS.

Patented Sept. 20,? 1949 UNITED STATES PATENT OFFICE 9 Claims.

This invention relates to a device for filing circular saws and particularly well adapted for jointing and filing raker and cutting teeth with a high degree of precision, as Well as saws and dados, having no raker teeth.

More particularly my invention comprises a stand in which a circular saw may be mounted for turning in a Vertical plane, adjustable as to height to bring the teeth at the required position for jointing and sharpening and for retaining the saw against lateral movements at the point where the dressing of the teeth is performed.

Another feature of my invention resides in a jointing gauge attachment for maintaining the le at the proper elevation for j ointing operations, the attachment being in the form of bar for guiding the dressing le to one elevation for operation on the cutting teeth and reversible for guiding ghe file to a lower elevation for dressing the raking eeth.

Another feature of my invention resides in the provision of a curved tilting rail for regulating the inclination of the le and a file guide and pitch gauge for regulating the pitch and slope ofthe teeth so that all the teeth will have a uniform bevel.

Another feature of my invention resides in the provision of a file holder for holding round, flat or triangular les for operation on any type of saw teeth in the filing device, such feature not being claimed in the present application but forming the subject matter of my copending application for File holders, iiled Januaryk 5, 1948, Serial No. 563.

Further features, objects and advantages of my invention will appear in the following detailed f description of a highly satisfactory embodiment thereof, reference being had to the accompanying drawings illustrating the same and forming a part of this specification.

In the drawings:

Fig. 1 is a front elevation of a device for filing circular saws in accordance with my invention.

Fig. 2 is a front elevation of the jointing and raker tooth gauge in a reversed position from that illustrated in Fig. 1.

Fig. 3 is a side elevation of the device.

Fig. 4 is a plan view thereof.

Fig. 5 is a fragmental vertical sectional view thereof taken substantially along line 5 5 of Fig. 1.

y Fig. 6 is a detail front elevation of a ille guide element thereof.

. Fig. 7 is a vertical sectional View of the guide taken on line '1 -1 of Fig. 6.

Fig. 8 is a detail horizontal Sectional View of Cil the saW holding elements taken substantially on line 8-8 of Fig. 5.

Referring to the drawings, the saw ling device illustrated comprises in general an upright base support 9 carrying a vertically adjustable saw mounting block I0. On the upper end of base 9 is a cross arm II carrying a curved tilting rail I2 upon which a bevel gauge 49 with a, file guide and pitch gauge I3 is adjustably mounted for guiding a file holder I4 in position for operating on the teeth of a circular saw I5. The cross arm II also carries, forward of saw I5, a removable jointing and' raker tooth gauge I6 for dressing the saw teeth to the required diametrical length with the raker teeth outer ends in a diameter slightly less than that of the outer ends of the cutting teeth.

Base support 9 comprises a rigid post for mounting in an upright position in a vice, or as shown, secured to a bench Il by means of a lateral fbolt I8 and a member I9 fastened to its sides by a pair of screws 20 at each side of and to the top surface of bench l1 by bolts 2| as best shown in Figs. 3 and 4, so as to maintain it in a rigid upright position. Support 9 has latertal guide elements 22 along its front side edges forming a channel between them which receives and guides saw mounting block I0, and a vertical slot Z3 midway between guide elements provides for the mounting bolt 24 for the saw mounting block I9 and up and down adjustments thereof. A wing nut 25 on bolt 24 facilitates manual operation in tightening and loosening of the block for such vertical adjustments.

Saw mounting block I9 has a snug sliding t in the channel on base support 9 provided by guide elements 22 so as to maintain it in all vertically adjusted positions in proper relation with Y respect to the saw dressing or filing guide elements carried on cross arm H at the top of base support 9. Above the saw block mounting bolt 24, block I9 is provided with a forwardly extending saw mounting bolt 26, upon which is mounted a bushing 21 having an outer diameter of a size corresponding with the diameter of the hole thru the circular saw l5 which is to be mounted thereon. As best shownin Fig. 5 the lower portion of block I9 has a depression 28 so that the teeth of saw I5 having the teeth set will be free from engagement therewith and adjacent the bottom of block I0 is a forward extending bolt 29 upon which a saw clamping bar 30 is pivotally mounted. Bar 30 has a spacing block 3l at its lower end thru which bolt 29 also passes and nut 32 on this bolt prevents the removal of barV 30 5 ofthe le holder may be adjusted, by the adjustment of sliding plate 50 on the tilting rail, the bevel is determined, and the pitch of the le is regulated by the angular adjustment of the file guide 60 with respect to plate 50 of the bevel gauge.

With this arrangement for determining the angularity oi the file for operating on a saw, it is to be noted that files of dilTerent types are employed in the iling and dressing operations, such as flat les, triangular iiles, and even round les as well as others are often employed. The particular function of the ille holder I4 is to guide a file by gripping and holding it With the operating le surface extending in a longitudinal direction and in alignment with the rectangular bar 62 of the led holder so that the other angular adjustments above referred to may be carried out for correct operations on the saw teeth. Since the le holder is covered in a copending application it will be only briefly described as follows.

As shown in Figs. 1, 3 and 4, le holder I 4 comprises the rectangular bar 62 with a clamp 61 integral with its inner end for receiving the end of a le such as a at file 68 or a triangular le 69 as generally indicated in Figs. 4 and 3, respectively, and holding it in such a manner that it will operate on the saw teeth along the vertical center line thereof-substantially over the projecting saw tooth guide element 4| projecting from the top of the cross arm l I. In operation, a saw I5 is placed in the saw mounting block I as illustrated in Fig. 1, the saw illustrated being a combination type having cutting teeth 'Ill with raker teeth ll in advance of each group of cutting teeth. The j ointing gauge I6 is positioned in the holders 42 with its notches 43 up for operating on the cutting teeth. Saw mounting block I0 is adjusted in base support 9 so that the shortest cutting teeth 'I0 are flush with the top of the gauge. With the angle gauge of the tilting arms set at zero and a flat le 68 (preferably) carried by the clamp 6l of tool holder I4 the points of all cutting teeth 'I0 that reach above gauge I6 and contact the le are led off. turning the saw a tooth at a time into position as indicated by the saw tooth guide element 4I. If none of the teeth are filed off the saw should be set a trie higher and the process is repeated. The filed guide 6B and le holder- I4 always maintain the file in the proper position. One hand is all that is necessary to operate the file; the other hand holds and turns the saw.

The raker teeth Il of combination saws are shorter than the cutting teeth usually about inch. For iiling these teeth it is not necessary to change the position of the saw and ksaw mounting block I0 with respect to base supporting but merely turn the jointing gauge bar I6 over (with notches 43 down as indicated in Fig. 2) andthe raker teeth 'II projecting above this guide, at a lower level, are iiled 01T successively turning the saw to bring the teeth into proper operating position as set forth above. 4

After the jointing operation is completed the jointing gauge I is removed. For sharpening the cutting teeth the saw is adjusted so that the depression between the teeth is even with the top of cross arm Il. The tilting gauge is set to the required angle as indicated by scale 31, at the right end of the cross arm. The bevel gauge 59 is set to the required angle (to the right if the teeth slope to the right or the same angle to the left when the saw is turned over and the teeth point to the left). The pitch gauge is set to the required angle by turning the file holder in accordance with the readings of scale. The depressions between the saw teeth are positioned successively to the center line of the le as indicated by the saw tooth guide element 4|. A typical example of the settings is `3, 10 and 8 on the respective scales. While these gures are selected at random, it is pointed out that the angles of inclination bevel and pitch vary with different types of saws. The angles may be determined so that the saw filer can be set to correspond for ling the saws as they come from the manufacturer which is advisable in some instances such as odd shaped teeth.

' When the saw is turned over and the other side filed the tilt gauge remains the same but the bevel and pitch are set at the same scale readings on the left as they were on the right.

It will be seen that the saw filing device as described provides for uniformity in ling of saw teeth both for jointing and sharpening operations thereon.

I claim:

1. A saw ling device comprising, an upright base support, saw mounting means vertically adjustable on said base support, a horizontal cross arm on the upper end of said support, a jointing bar carried by said cross arms in a position in front of a saw carried by the saw mounting means, a curved tilting rail pivotally carried by the ends of said cross arm, a bevel gauge slidingly mounted on said curved tilting rail, a le guide rotatably mounted in said bevel gauge, means for holding said file guide at the required angle for the proper pitch of a file, a le holder extending through said le guide, and a clamp carried by said .file holder for securing a le so as to extend therefrom in a position for operating on teeth of a saw mounted in the saw mounting block.

2. A device for iling circular saws including, an upright base support, said support having lateral guide elements and a vertical slot therethru between the guide elements, a saw mounting block slidable on said base support between said guide elements, a clamping bolt secured to said block and extending thru the vertical slot in said base support for securing the block in a vertically adjusted position on said base support, a circular saw bushing element, a bolt extending from said block on which said bushing is mounted, a flexible bar pivoted at its lower end to said block and having an aperture therethru thru which said bushing carrying bolt is adapted to extend, a nut on said bolt for clamping said bar against the bushing, a saw contact block above and below said bushing for pressing engagement against the outer side of a circular saw mounted on said bushing, a cross arm on the upper end of said base support, and a conta-ct plate on said arm for engagement with the inner side of the circular saw spacing it so that its saw teeth will not engage the cross arm therebeyond and cooperating with the upper saw contact block on said bar for maintaining the upper portion of the sawagainst lateral movement.

3. A device for filing circular saws including, a base support having means for mounting a circular saw in an upright position with its upper teeth extending above the base support, means for holding the upper portion of the saw against lateral movement, rearwardly extending arms pivotally supported from the upper end of said base/support, the axis of the pivot being substantially in the plane of the saw, a curved rail connecting the rear ends of said arms, a bevel gauge slidable on said curved rail, means for securing aasaac said: gauge inani adjusted? position on) the raili,V a file: guide rotatablyfmountedin bevelv gauge. means tcmretaning. thel'eguide in an" adjusted. angulai:` pitchposit'ion in saild bevel gauge, a file holder slidablyextending thruasaid'fll'el guide, and' a draw bollirconnected: between said rearwardly' extending arms fory clamping the, same with respect to said basei support so= as to maintain the curved at. any required inclination.

4:'.4 A; device for ling circluarsaws including, a base support having means for mountingja circularfsaw.' in an: upright position with its u pper teeth extending; abevev the base support, means for lfiolding;` the upper portion of the saw against lateral incitement, rearwardly extending arms pivotally supported from thev upper end of said base support, the axis of the pivot being substantially in: the-plane of the saw., and acurved bevel gauge supporting; railY connecting the rear ends of said arms the, curved. rail having as its center a point in the upper edge of a saw mounted on thefbase support.

5. A device-foriiling circular saws including, a base support having, means for mounting a circular saw in upright position with its upper teeth extending abovel the basey support, means for holding the upper portion of the saw against lateral movement, rearwardly extending arms pivotallysupported from the upper end. of said base support, the axis of the pivot being substantially ini-"the plane of the Saw, a curved bevel gauge supporting rail connecting the rear ends of said arms the curved rail havingy as its center a point inthe upper edge of a saw mounted on. the base support and a draw bolt connected between said rearwardly extending arms for clamping the same; with respect to said, base support so as to maintainthe curved. rail at any required inclination.

64. A device for iiling circular saws including, a base support having means for mounting a circu lar saw in. an upright position with its upper teeth i extendingabove the base support, means for. holding the upper portion of the saw against lateral movement, brackets having slotted. holders carried` byy said base support. at the level of theupper portion of a saw mounted on the base support,.a.jointing gauge bar supported insaid holderslin aiposition` so as to be in front of. the upper edge of the circular saw, and said bar having notches along one side adjacent the endsl thereof so. that when the bar is inserted in the' holders with the notches. down it will be at a lower ele.- vation than when it is inserted in the holders with the notches up..

7.. Adevice for ling circular saws including a. base support for supporting and maintainingv a circular saw in an` upright position for ling operationson the teeth thereof, a curved inclination rail pivotally carried by said support, said. rail having bevel scales thereon extending right and left from a central point, and a bevel gauge cornprising an upright plate with forwardly extending slotted arms thru which said. rail extend-s, an index. thereonv for cooperating with the scales on the rail, and a clamping screw extending thruf the upright plate for engaging the rail for holding theA beveli gauge in adjusted position. onv the rail.

8. A device for filing circular saws including a base supportv fory Supporting andmaintainingx a circular saw in an upright position for filing operationslon the teeth thereof, a curved inclination rail pivotally carried by said support, said rail; having bevel scales thereon extending right and lett` from a central point, and a bevel gauge comprising an upright. plate withf forwardly extending slotted: arms thru which said rail ex'- tends, an index thereon for cooperating with; the scales onl the rail, a clamping `screw extending thru the upright plate for engaging the rail for holding the bevel gauge in adjusted position on the rail, said plate having a circular tapered opening therethru, a tapered hub rotatably mounted therein having a slot therethru for re'- n ceivi'ng and guiding aile holder, and means for holding said: hub with the slot therein in angular- 1y? adjustable. positions.

9. A device for filing circular saws4 including a baseA support for supporting and maintaining a circular saw in an upright position for filing operations onthe teeth thereof, a curved. inclination raily pivotally carried by said support, saidf rail' haring bevel' scales thereon extending right and left from a central point, anda bevel gauge comprising an upright plate with forwardly extending `slotted arms thru which said rail extends, an index thereon. for cooperating with the scalesl on the rail, a clamping screw extending thru the upright plate for engaging the rail for holding the bevel gauge in; adjusted position on the rail', said plate having a circular tapered opening: therethru', a tapered hub rotatably mounted therein having a. slot therethru i`o1r receiving and guiding atile holder, and means for holding saidi hub with thev slot therein in angularly adjustable' positions including, a plate from which said hub,v extends, said plate engaging the'iront face of said bevel gauge plate and having an index pointer on itsI upper end', a pitch angle gauge on said bevel gauge plate with which said pointer cooperates; said bevel gauge piate having an arcuate slot'.- therethru, and aclamping screw extending from said pitch gauge plate and thru said arcuate slot; in the bevel gauge plate for retaining the pitchV gauge members assembled' on the bevel gauge and' clam-ping the same at adjusted pitch angles.

WALTER G. SHEARER.

REFERENCES CITED The following references are of record in the' file of thisl patent:

UNITED STATES PATENTS Number Name Date 203,616! Hays May 14g, 1878'. 409,866 Penrose Aug. 27, 1889: 675,780 Lucas June 4, 1901. 905,924 Reynolds Dec. 8, 1908 1,496,975 Bothwell June 10', 1924.` 1,852,276v Waller Apr. 5, 1932 

